I'll do a little tutorial along the way in case you've never made an altered candle before :)
Step 1 - Stamp your image onto a piece of tissue paper. I find the tissue paper they wrap clothes and flowers in best. Experiment with your mediums for colouring, some look good others not so good. Chalks work very well. For this I used promarkers as I've never used them on tissue so wanted to see how they performed. Colour your image in as normal, use a shade or two darker than you normally would, add sparkles with sakura stardust or sparkly gel pens etc then cut around your image.
Step 2 - Place image onto your candle then use a piece of wax paper, wrap this tightly over your image and use a heat gun to gently melt the wax. If you have neither you can use greaseproof paper and a hairdryer, its the melted wax that holds it in place. Allow to cool for a few seconds and remove the wax paper and there's your image :)
Sweet Stampin challenge - Anything but a card
ABC - G for Glitter
The Crafty Pad - Christmas
Craft your passion - Glitter & Sparkles